f(x)=20-4x

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Solution for f(x)=20-4x equation: 


Simplifying
f(x) = 20 + -4x

Multiply f * x
fx = 20 + -4x

Solving
fx = 20 + -4x

Solving for variable 'f'.

Move all terms containing f to the left, all other terms to the right.

Divide each side by 'x'.
f = 20x-1 + -4

Simplifying
f = 20x-1 + -4

Reorder the terms:
f = -4 + 20x-1

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